condition mean min max ZT0-3 0.36321678175000005 0.26166106100000003 0.4647725025 ZT4-7 0.896916992 0.8749040875 0.9189298965 ZT8-11 1.73903168825 1.394330435 2.0837329415 ZT12-15 17.70850120625 13.6035939675 21.813408445 ZT16-19 10.639928169000001 9.537405628 11.74245071 ZT20-23 6.49691228775 5.777807682500001 7.216016893